The lighting apparatus includes a first light emitting diode (led) module, a second led module and a reflector. The first led module includes a first plurality of LEDs disposed on one side of a first substrate. The second led module includes a second plurality of LEDs disposed on one side of a second substrate. The reflector is disposed between the first led module and the second led module and may reflect in a light emission direction light emitted from the plurality of the LEDs. Additionally, when the light emitted from the plurality of the LEDs is reflected by a reflective surface of the reflector, and is projected to a plane, images of outermost light sources are distributed on the plane to substantially have a circular shape.
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1. A lighting apparatus comprising:
a heat radiating body having a first heat radiating body, a second heat radiating body and a housing space inside the heat radiating body, and the housing space is defined by four inner walls and a top surface wall;
a first substrate on which a first plurality of light emitting diodes (LEDs) are disposed in two lines on one side of the first substrate, the first led module provided on a first one of the four inner walls of the first heat radiating body;
a second substrate being disposed apart from the first substrate at a distance and including a second plurality of LEDs disposed in two lines on one side of the second substrate, the second led module provided on a second one of the four inner walls of the second heat radiating body;
a reflector being disposed between the first substrate and the second substrate, the reflector including a first surface that is inclined with respect to the one side of the first substrate and a second surface that is inclined with respect to the one side of the second substrate, the reflector to receive light from the first and second plurality of LEDs and to reflect the light in a light emission direction away from the top surface wall of the housing space and to outside of an opening of the heat radiating body, the reflector including a first locking part and a second locking part, and the first locking part and the second locking part to prevent the reflector from moving in the light emission direction away from the top surface wall of the housing space; and
wherein the first led module, the second led module and the reflector are provided within the heat radiating body, wherein the light from the first plurality of LEDs is reflected by the first surface of the reflector in the light emission direction away from the top surface of the housing space and the light from the second plurality of LEDs is reflected by the second surface of the reflector in the light emission direction away from the top surface of the housing space.
7. A lighting apparatus comprising:
a heat radiating body having a first heat radiating body and a second heat radiating body, the heat radiating body having a cylindrical shape and a housing space inside the heat radiating body has a hexahedral shape, the housing space including four inner walls, a top surface wall and an opening;
a first light emitting diode (led) module that includes a first substrate, a first projection and a first plurality of LEDs disposed on one side of the first substrate, the first led module provided on a first one of the four inner walls of the first heat radiating body;
a second led module that includes a second substrate different than the first substrate, a second projection and a second plurality of LEDs disposed on one side of the second substrate, wherein the one side of the second substrate is disposed apart from the one side of the first substrate, the second led module provided on a second one of the four inner walls of the second heat radiating body;
a reflector being disposed between the first led module and the second led module to receive light from the first and second plurality of LEDs and to reflect the light in a light emission direction away from the top surface wall of the housing space and to outside of the opening of the housing space, the reflector including a first locking part to receive the first projection and a second locking part to receive the second projection, and the first locking part and the second locking part to prevent the reflector from moving in the light emission direction away from the top surface wall of the housing space, the reflector including a first reflector surface and a second reflector surface different than the first reflector surface, the first reflector surface being inclined with respect to the one side of the first substrate, and the second reflector surface being inclined with respect to the one side of the second substrate, and
wherein the first led module, the second led module and the reflector are provided within the heat radiating body,
wherein when the light emitted from the first plurality of LEDs is reflected by the first reflective surface of the reflector in the light emission direction away from the top surface of the housing space and the light emitted from the second plurality of LEDs is reflected by the second reflective surface of the reflector in the light emission direction away from the top surface of the housing space, and is projected to a plane, images of outermost light sources are distributed on the plane to substantially have a circular shape.
2. The lighting apparatus of
3. The lighting apparatus of
4. The lighting apparatus of
5. The lighting apparatus of
6. The lighting apparatus of
8. The lighting apparatus of
9. The lighting apparatus of
10. The lighting apparatus of
11. The lighting apparatus of
12. The lighting apparatus of
13. The lighting apparatus of
14. The lighting apparatus of
15. The lighting apparatus of
an optic sheet converging or diffusing the light incident on one side thereof;
a glass plate disposed on the other side of the optic sheet; and
a frame surrounding the glass plate.
16. The lighting apparatus of
17. The lighting apparatus of
18. The lighting apparatus of
19. The lighting apparatus of
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The present application claims priority under 35 U.S.C. §119 (e) of Korean Patent Application No. 10-2010-0033014, filed on Apr. 10, 2010, the entirety of which is hereby incorporated by reference in its entirety.
1. Field
This embodiment relates to a lighting apparatus.
2. Description of the Related Art
A light emitting diode (hereinafter, referred to as LED) is an energy element that converts electric energy into light energy. The LED has advantages of high conversion efficiency, low power consumption and a long life span. As the advantages are widely spread, more and more attentions are now paid to a lighting apparatus using the LED. In consideration of the attention, manufacturer producing light apparatuses are now producing and providing various lighting apparatuses using the LED.
The lighting apparatus using the LED are generally classified into a direct lighting apparatus and an indirect lighting apparatus. The direct lighting apparatus emits light emitted from the LED without changing the path of the light. The indirect lighting apparatus emits light emitted from the LED by changing the path of the light through reflecting means and so on. Compared to the direct lighting apparatus, the indirect lighting apparatus mitigates to some degree the intensified light emitted from the LED and protects the eyes of users.
One embodiment is a lighting apparatus. The lighting apparatus includes:
a first light emitting diode (LED) module including a plurality of LEDs disposed on one side of a first substrate;
a second LED module including the plurality of the LEDs disposed on one side of a second substrate, wherein the one side of the second substrate is disposed apart from the one side of the first substrate; and
a reflector being disposed between the first LED module and the second LED module and reflecting in a light emission direction light emitted from the plurality of the LEDs.
When the light emitted from the plurality of the LEDs is reflected by a reflective surface of the reflector, and is projected to a plane, images of outermost light sources are distributed on the plane to substantially have a circular shape.
Another embodiment is a lighting apparatus. The lighting apparatus includes:
a first substrate on which a plurality of LEDs are disposed in two lines on one side thereof;
a second substrate being disposed apart from the first substrate at a distance and including the plurality of the LEDs disposed in two lines on one side thereof; and
a reflector being disposed between the first substrate and the second substrate and including sides inclined with respect to one sides of the first and the second substrates.
Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.
It will be understood that when an element is referred to as being “on” or “under” another element, it can be directly on/under the element, and one or more intervening elements may also be present.
A lighting apparatus 100 according to an embodiment of the present invention will be described in detail with reference to
Referring to
Referring to
Here, the cylindrical heat radiating body 110 does not necessarily have a plurality of the heat radiating fins. If the cylindrical heat radiating body 110 has no heat radiating fin, the cylindrical heat radiating body 110 may have a little lower heat radiating effect than that of the heat radiating body 110 shown in
Referring to
The first and the second heat radiating bodies 110a and 110b have integrally formed respectively. The first and the second heat radiating bodies 110a and 110b are manufactured with a material capable of well transferring heat. For example, Al and Cu and the like can be used as a material for the heat radiating bodies.
The first LED module 120a, i.e., a heat generator, is placed on the inner wall of the first heat radiating body 110a. The second LED module 120b, i.e., a heat generator, is placed on the inner wall of the second heat radiating body 110b. The first heat radiating body 110a is integrally formed, thus helping the heat generated from the first LED module 120a to be efficiently transferred. That is, once the heat generated from the first LED module 120a is transferred to the first heat radiating body 110a, the heat is transferred to the entire first heat radiating body 110a. Here, since the first heat radiating body 110a is integrally formed, there is no part preventing or intercepting the heat transfer, so that a high heat radiating effect can be obtained.
Similarly to the first heat radiating body 110a, the second heat radiating body 110b emits efficiently the heat generated from the second LED module 120b, i.e., a heat generator. The first and the second heat radiating bodies 110a and 110b are provided to the first and the second LED modules 120a and 120b, i.e., heat generators, respectively. This means that the heat radiating means one-to-one correspond to the heat generators and radiate the heat from the heat generators, thereby increasing the heat radiating effect. That is, when the number of the heat generators is determined and the heat generators are disposed, it is a part of the desire of the inventor of the present invention to provide the heat radiating means according to the number and disposition of the heat generators. As a result, a high heat radiating effect can be obtained. A description thereof will be given below with reference to
Referring to
The first and the second heat radiating bodies 110a and 110b constituting the heat radiating body 110 have a semi-cylindrical shape respectively. The two heat radiating bodies are coupled to each other based on a first base line 1-1e and then form a cylindrical heat radiating body 110. However, the coupling boundary line is not necessarily the same as the first base line 1-1′. For example, the base line 1-1′ is rotatable clockwise or counterclockwise to some degree around the center of the heat radiating body 110.
Since the heat radiating body 110 has a cylindrical shape, the heat radiating body 110 can be easily installed by being inserted into a ceiling's circular hole in which an existing lighting apparatus has been placed. Moreover, the heat radiating body 110 is able to easily take the place of the existing lighting apparatus which has been already used.
As shown in
The first LED module 120a is placed on the inner wall of the first heat radiating body 110a. The first heat radiating body 100a further includes three inner walls other than the inner wall on which the first LED module 120a has been placed. Therefore, the heat generated from the first LED module 120a, i.e., a heat generator, can be radiated through the three inner walls as well as the inner wall on which the first LED module 120a has been placed.
The second LED module 120b is placed on the inner wall of the second heat radiating body 110b. The second heat radiating body 100b further includes three inner walls other than the inner wall on which the second LED module 120b has been placed. Therefore, the heat generated from the second LED module 120b, i.e., a heat generator, can be radiated through the three inner walls as well as the inner wall on which the second LED module 120b has been placed.
While the first heat radiating body 110a is coupled to the second heat radiating body 110b, the first and the second LED modules 120a and 120b, i.e., heat generators, emit light toward the center of the cylindrical heat radiating body, and then the heat generated from the LED modules is radiated through the first and the second heat radiating bodies 110a and 110b which are respectively located on the circumference in an opposite direction to the center of the heat radiating body 110. From the viewpoint of the entire heat radiating body 110, the heat is hereby radiated in a direction from the center to the circumference and in every direction of the circumference, obtaining a high heat radiating effect. Moreover, since a heat radiating member such as the heat radiating fin formed on the heat radiating body is widely provided on the circumference of the cylindrical heat radiating body, the heat radiating member has high design flexibility.
Referring to
The heat radiating body 110 is divided into four heat radiating bodies 110a, 110b, 110c and 110d on the basis of a second base axis 2-2′ and a third base axis 3-3′. In other words, one cylindrical heat radiating body 110 is formed by coupling the four heat radiating bodies 110a, 110b, 110c and 110d.
With respect to five inner walls of the heat radiating body 110, the four LED modules 120a, 120b, 120c and 120d are respectively placed on four inner walls excluding the inner wall facing the opening 117.
As such, the lighting apparatuses shown in
Since not only the inner wall on which the LED module is placed but an inner wall on which the LED module is not placed are included in one cylindrical heat radiating body 110 formed by coupling the first and the second heat radiating bodies 110a and 110b, the heat radiating body 110 has a more excellent heat radiating effect than that of a conventional lighting apparatus having a heat radiating body formed only on the back side of the inner wall on which the LED module is placed.
Additionally, as described above in connection with
Hereinafter, components housed in the inner housing space of the cylindrical heat radiating body 110 will be described in detail with reference to
The first LED module 120a includes a substrate 121a, a plurality of LEDs 123a, a plurality of collimating lenses 125a, a projection 127a and a holder 129a.
A plurality of the LEDs 123a and a plurality of the collimating lenses 125a are placed on one surface of the substrate 121a. The other surface of the substrate 121a is fixed close to the inner wall of the heat radiating body 110a.
A plurality of the LEDs 123a are disposed separately from each other on the one surface of the substrate 121a in a characteristic pattern. That is, a plurality of the LEDs 123a are disposed in two lines. Also, the plurality of the LEDs 123a can be disposed in three or more lines based on a size of the substrate or a number of the LEDs. In
The collimating lens 125a collimates in a predetermined direction the light emitted from around the LED 123a. Such a collimating lens 125a is formed on the one surface of the substrate 121a and surrounds the LED 123a. The collimating lens 125a has a compact funnel shape. Therefore, the collimating lens 125a has a lozenge-shaped cross section.
Meanwhile, a groove for receiving the LED 123a is formed on one surface on which the collimating lens 125a comes in contact with the substrate 121a.
The collimating lenses 125a correspond to the LEDs 123a. Thus, the number of the collimating lenses 125a is equal to the number of the LEDs 123a. Here, it is desirable that the collimating lens 125a has a height greater than that of the LED 123a.
Such a collimating lens 125a collimates the light, which is emitted from around the LED 123a, into the reflector 140. The collimating lens 125a surrounds the LED 123a such that a user is not able to directly see the intensified light emitted from the LED 123a. To this end, the outside of the collimating lens 125a can be made of an opaque material.
The inside of the collimating lens 125a shown in
A projection 127a is received by a receiver 133a of the first fixing plate 130a. Subsequently, the back side to the side in which the receiver 133a is formed has a projecting shape and is received by a locking part 141a of the reflector 140. An embodiment without either the first fixing plate 130a or the receiver 133a of the first fixing plate 130a can be provided. In this case, the projection 127a can be directly received by the locking part 141a of the reflector 140. Such a projection 127a functions as a male screw of a snap fastener. The receiver 133a and the locking part 141a function as a female screw of a snap fastener.
After the projection 127a is in contact with and coupled to the locking part 141a directly or through the receiver 133a of the first fixing plate 130a, the reflector 140 is fixed to the first fixing plate 130a or the first LED module 120a. Therefore, the reflector 140 is prevented from moving toward the opening 117 (i.e., a light emission direction). In addition, the inner walls of the heat radiating body 110 prevents the reflector 140 from moving in a light emitting direction of the reflector 140. The reflector 140 is also prevented from moving in a light emission direction of the LED modules 120a and 120b by either the LED modules 120a and 120b fixed to the heat radiating body 110 or the fixing plates 130a and 130b fixed to the heat radiating body 110.
Accordingly, it is not necessary to couple the reflector 140 to the first LED module 120a or to the inner wall of the first heat radiating body 110a by use of a separate fixing means such as a screw and the like. Moreover, there is no requirement for a separate fixing means for fixing the reflector 140 to the inner walls of the first and the second heat radiating bodies 110a and 110b. As mentioned above, since the reflector 140 has no additional part like a through-hole for allowing a separate fixing means to pass, the reflector 140 can be formed to have its minimum size for obtaining a slope-shaped reflecting area. This means that it is possible to cause the lighting apparatus according to the embodiment of the present invention to be smaller in comparison with the amount of the emitted light.
The LED module 120a shown in
The holder 129a has an empty cylindrical shape. The top and bottom surfaces of the holder 129a are opened. The holder 129a surrounds the collimating lens 125a on the substrate 121a. The holder 129a performs a function of fixing the collimating lens 125a.
Referring to
One collimating lens 125a is inserted into one through hole 131a. It is desired that the through hole 131a has a shape allowing the collimating lens 125a to pass the through hole 131a
The receiver 133 is able to receive the projection 127a of the first LED module 120a. When the receiver 133 receives the projection 127a, the first LED module 120a and the first fixing plate 130a are fixed close to each other. When the projection 127a is attached to or removed from the receiver 133, the first fixing plate 130a is easily attached to or removed from the first LED module 120a.
A plurality of the second male screws 135a penetrate the first fixing plate 130a and the first LED module 120a, and then is inserted and fixed into a plurality of second female screws (not shown) formed on the inner wall of the first heat radiating body 110a. The first fixing plate 130a and the first LED module 120a are easily attached and fixed to the inner wall of the first heat radiating body 110a by a plurality of the second male screws 135a and are also easily removed from the inner wall of the first heat radiating body 110a.
The reflector 140 changes the path of light emitted from the first and the second LED modules 120a and 120b. Referring to
The first and the second fixing plates 130a and 130b and the first and the second LED modules 120a and 120b are coupled to the opened lateral sides. The two opened lateral surfaces of the reflector 140 are hereby closed. Here, projecting parts are formed on the back sides of the sides on which the receivers 133a and 133b receiving the projections 127a and 127b are formed. Locking parts 141a and 141b are formed in the reflector 140 such that the projecting parts are in a contact with and are coupled to the locking parts 141a and 141b. Therefore, the first and the second fixing plates 130a and 130b can be securely fixed to the reflector 140. Here, as described above, the projection 127a can be directly received by the locking part 141a without the first fixing plate 130a or the receiver 133a of the first fixing plate 130a.
The reflector 140 has a shape corresponding to the housing space of the heat radiating body 110. That is, the reflector 140 is formed to be exactly fitted to the housing space partitioned and formed by the inner walls of the heat radiating body 110. Thus, when the first and the second heat radiating bodies 110a and 110b are coupled to each other, the reflector 140 is fitted exactly to the housing space and is not able to move inside the heat radiating body 110.
As described above, the reflector 140 is prevented from moving toward the opening 117 (i.e., the light emission direction) by the projections 127a and 127b of the first and the second LED modules 120a and 120b. In addition, the reflector 140 has a shape fitting well into the housing space of the heat radiating body 110. As a result, when the first and the second heat radiating bodies 110a and 110b are coupled to each other, the first and the second heat radiating bodies 110a and 110b give a pressure to the reflector 140. Therefore, the reflector 140 is prevented from moving not only in the light emission direction but in a direction perpendicular to the light emission direction.
Accordingly, the lighting apparatus according to the present invention does not require a separate fixing means such as a screw for fixing the reflector 140 to the inside of the heat radiating body 110. Additionally, the reflector 140 can be formed to have its minimum size for obtaining a slope-shaped reflecting area. This means that it is possible to cause the lighting apparatus to be smaller in comparison with the amount of the emitted light.
The projections of the first and the second LED modules 120a and 120b are fitted and coupled to the receivers of the first and the second fixing plates 130a and 130b respectively, and are fixed to the inner walls of the heat radiating bodies 110a and 110b, respectively. Then, the receivers 133a and 133b are disposed to be in contact with and coupled to the locking parts 141a and 141b by disposing the reflector 140 between the receivers 133a and 133b. The first and the second heat radiating bodies 110a and 110b are coupled to each other toward the reflector 140 so that the reflector 140 is fixed to the inside housing space of the heat radiating body 110. As a result, since there is no requirement for a separate screw for fixing the reflector 140 to the heat radiating body 110 having the opening formed therein in one direction, it is easy to assemble the lighting apparatus of the present invention.
Referring to
That is, the reflective surface of the reflector 140 is inclined toward the opening 117 of the heat radiating body with respect to one sides of the first and the second LED modules, for example, one side of the substrate.
The reflective surface includes two surfaces inclined with respect to the one sides of the first and the second LED modules, and the two surfaces are in contact with each other at a predetermined angle. Herein, the predetermind angle may be in a range of 30 degree˜150 degree with respect to the one sides of the first and the second LED modules. The predetermined angle may be desirably in 60 degree˜120 degree with respect to the one sides of the first and the second LED modules.
Light incident from the first and the second LED modules 120a and 120b formed at both sides of the reflective surface to the reflective surface of the reflector 140 is reflected by the reflective surface and moves toward the opening (i.e., the light emission direction), that is, in the down direction of
Referring to
In
Like the lighting apparatus shown in
As shown in
An optic sheet 150 converges or diffuses light reflected from the reflective surface of the reflector 140. That is, the optic sheet 150 is able to converge or diffuse light in accordance with a designer's choice.
As shown in
Referring to
The first frame 161 has a structure surrounding all corners of the optic sheet 150 and has a predetermined area of “D” from the outer end to the inner end thereof.
The second frame 163 is extended by a predetermined length from the lower part of the inner end of the first frame 161 toward the center of the optic plate 160 such that the optic sheet 150 is seated.
The first and the second frames 161 and 163 receive and fix the optic sheet 150. Additionally, a connecting member 170 and the first and the second frames 161 and 163 prevent a user from directly seeing the light emitted from the LED 123a through the reflection cover 180.
The glass plate 165 is inserted and fixed to the second frame 163 and prevents the optic sheet 150 from being bent in the light emission direction by heat.
Meanwhile, while the optic sheet 150 and the optic plate 160 are described as separate components in
The connecting member 170 is coupled to the heat radiating body 110 and to the reflection cover 180 respectively. As a result, the heat radiating body 110 is coupled to the reflection cover 180. The connecting member 170 receives the optic plate 160 and fixes the received optic plate 160 so as to cause the optic plate 160 not to be fallen to the reflection cover 180. The connecting member 170 as well as the optic plate 160 prevents a user from directly seeing the light emitted from the LED 123a through the reflection cover 180. The connecting member 170 will be described in detail with reference to
Referring to
The third frame 171 surrounds the first frame 161 of the optic plate 160. Each corner of the third frame 171 has a hole formed therein for inserting a first coupling screw 175. The heat radiating body 110 and the connecting member 170 can be securely coupled to each other by inserting the first coupling screw 175 into the hole formed in the corner of the third frame 171.
The fourth frame 173 is extended by a predetermined length from the lower part of the inner end of the third frame 171 toward the center of the connecting member 170 such that the first frame 161 of the optic plate 160 is seated. Also, the fourth frame 173 is extended by a predetermined length in a direction in which the connecting member 170 is coupled to the reflection cover 180.
The third and fourth frames 171 and 173 receive or fix the optic plate 160 and prevent a user from directly seeing the light emitted from the LED 123a through a reflection cover 180.
Referring to
The reflection cover 180 includes a fifth frame 181 surrounding the fourth frame 173 of the connecting member 170 such that the reflection cover 180 contacts strongly closely with the connecting member 170, and includes a cover 183 converging in the down direction the light which has transmitted the optic sheet 150 and the glass plate 165.
The fifth frame 181 can be more securely coupled to the fourth frame 173 by means of a second coupling screw 185.
The cover 183 has an empty cylindrical shape. The top and bottom surfaces of the cover 183 are opened. The radius of the top surface thereof is less than that of the bottom surface thereof. The lateral surface thereof has a predetermined curvature.
Hereinafter, the effect of the lighting apparatus according to the embodiment of the present invention will be described with various experiments.
The first experiment employs, as shown in
Referring to
Referring to
As a result of the first experiment shown in
The second experiment adds the optic sheet 150 diffusing light to the first experiment shown in
Referring to
Referring to
As a result of the second experiment shown in
The third experiment adds the optic sheet 150 converging light to the first experiment shown in
Referring to
Referring to
As a result of the third experiment shown in
The fourth experiment adds the optic plate 160 equipped with the glass plate 165 having a diffusing function to the first experiment shown in
Referring to
Referring to
As a result of the fourth experiment shown in
The features, structures and effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects and the like provided in each embodiment can be combined or modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, contents related to the combination and modification should be construed to be included in the scope of the present invention.
Although embodiments of the present invention were described above, theses are just examples and do not limit the present invention. Further, the present invention may be changed and modified in various ways, without departing from the essential features of the present invention, by those skilled in the art. For example, the components described in detail in the embodiments of the present invention may be modified. Further, differences due to the modification and application should be construed as being included in the scope and spirit of the present invention, which is described in the accompanying claims.
Kong, Kyung-il, Kim, Eunhwa, Kang, Seok Jin, Hyun, Ji Yeon
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